The biceps brachii muscles are two of the main muscles of the upper arm. Commonly known as the “biceps,” these muscles help with the movement of the forearms and flexion at the shoulder and elbow joints, which help with lifting and pulling. The biceps brachii are antagonistic to the triceps and make up 33% of the upper arm mass. These muscles are worked when upper arm curls are performed with free weights.
Severe weakness may result in an inability to flex the forearms, which can interfere with daily activities such as feeding oneself or hair brushing. The most common injuries are tears at the elbow and ruptures due to sudden injuries, such as lifting a heavy box too quickly, that forces the arm to straighten and puts too much stress on the biceps, which in turn, causes the tendon to tear from the bone. Treatments for biceps brachii injuries can include surgery, physical therapy, rest, and non-steroidal anti-inflammatory medications like ibuprofen and naproxen.
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